US4575453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified Claus furnace
Assignee: BP Corp North America Inc
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Filing: 1984-11-13
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Granted: 1986-03-11
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Expires: 2004-11-13
Abstract
Abstract Modified Claus furnace containing, in addition to primary reaction chamber, a secondary chamber in heat exchange with said primary reaction chamber wherein H2S is cracked to supply hydrogen needed downstream in a clean-up system. This eliminates the need for supplemental hydrogen generator now usually provided for in a sulfur recovery system. A catalyst such as cobalt-molybdenum can be used in the secondary reaction chamber.
Inventors
- 👤 Robert L. Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:53
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/0404; C01B17/0413; C01B17/0417
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A Claus thermal conversion furnace comprising a primary furnace chamber, a burner in said primary furnace chamber, an oxidant containing gas supply inlet connected to said burner, a hydrogen sulfide containing gas supply conduit connected to said burner, an outlet extending from said furnace, a secondary reaction chamber in heat but not gas exchange relationship with said primary furnace chamber, said secondary reaction chamber extending through the length of said primary furnace chamber to a point in the outlet extending from said furnace, a hydrogen sulfide decomposing catalyst in said secondary reacton chamber, a hydrogen sulfide containing gas supply conduit connected to said secondary reaction chamber.
Claim 2
Dependent Claim
106 words
A Claus thermal conversion furnace comprising a primary furnace chamber, a burner in said primary furnace chamber, an oxidant containing gas supply inlet connected to said burner, a hydrogen sulfide containing gas supply conduit connected to said burner, an outlet extending from said furnace, a secondary reaction chamber in heat but not gas exchange relationship with said primary furnace chamber, said secondary reaction chamber extending through the length of said primary furnace chamber to a point in the outlet extending from said furnace, a hydrogen sulfide decomposing catalyst in said secondary reacton chamber, a hydrogen sulfide containing gas supply conduit connected to said secondary reaction chamber.
Claim 3
Dependent Claim
10 words
The furnace of claim 1 wherein said catalyst is cobalt-molybdenum.
Claim 4
Dependent Claim
233 words
Apparatus for the treatment of a gas stream containing hydrogen sulfide comprising: (a) a Claus thermal conversion furnace comprising a primary furnace chamber, a burner in said primary furnace chamber, an oxidant containing gas supply inlet connected to said burner, a hydrogen sulfide containing gas supply inlet connected to said burner, an outlet extending from said furnace, a secondary reaction chamber containing a hydrogen sulfide decomposing catalyst in heat but not gas exchange relationship with said primary furnace chamber, said secondary reaction chamber extending through the length of said primary furnace chamber to a point in the outlet extending from said furnace, a hydrogen sulfide containing gas supply inlet connected to said secondary reaction chamber; (b) a means for sulfur recovery comprising at least one catalytic reactor and at least one sulfur condenser; (c) a conduit connecting said outlet of said thermal conversion furnace and said means for sulfur recovery; (d) a tail gas clean-up system comrising a hydrogenation reactor for the conversion of sulfur species to hydrogen sulfide; (e) a conduit connecting the output of said means for sulfur recovery and said tail gas clean-up system; (f) means to recover sulfur and hydrogen sulfide from the output from said tail gas clean-up system; and (g) a conduit extending from said tail gas clean-up system and said means to recover sulfur and hydrogen sulfide from the output from said tail gas clean-up system.
Claim 5
Dependent Claim
233 words
Apparatus for the treatment of a gas stream containing hydrogen sulfide comprising: (a) a Claus thermal conversion furnace comprising a primary furnace chamber, a burner in said primary furnace chamber, an oxidant containing gas supply inlet connected to said burner, a hydrogen sulfide containing gas supply inlet connected to said burner, an outlet extending from said furnace, a secondary reaction chamber containing a hydrogen sulfide decomposing catalyst in heat but not gas exchange relationship with said primary furnace chamber, said secondary reaction chamber extending through the length of said primary furnace chamber to a point in the outlet extending from said furnace, a hydrogen sulfide containing gas supply inlet connected to said secondary reaction chamber; (b) a means for sulfur recovery comprising at least one catalytic reactor and at least one sulfur condenser; (c) a conduit connecting said outlet of said thermal conversion furnace and said means for sulfur recovery; (d) a tail gas clean-up system comrising a hydrogenation reactor for the conversion of sulfur species to hydrogen sulfide; (e) a conduit connecting the output of said means for sulfur recovery and said tail gas clean-up system; (f) means to recover sulfur and hydrogen sulfide from the output from said tail gas clean-up system; and (g) a conduit extending from said tail gas clean-up system and said means to recover sulfur and hydrogen sulfide from the output from said tail gas clean-up system.
Claim 6
Dependent Claim
13 words
The apparatus of claim 3 wherein said secondary reaction chamber contains a catalyst.
Claim 7
Dependent Claim
10 words
The apparatus of claim 4 wherein said catalyst is cobalt-molybdenum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |